Vanadium electrolyte online repairing system

Abstract

The invention discloses a vanadium electrolyte online repairing system, and relates to the technical field of all-vanadium battery operation and maintenance. The device comprises a box body, a sulfuric acid tank and a galvanic pile are arranged in the box body, a horizontal mounting table is mounted in the box body, the galvanic pile is placed on the mounting table, the sulfuric acid tank is arranged below the mounting table, and the sulfuric acid tank is communicated with an anode chamber of the galvanic pile through a first circulating system; a liquid inlet end and a liquid outlet end of a cathode chamber of the electric pile are respectively communicated with a feeding pipe and a discharging pipe, the feeding pipe and the discharging pipe extend out of the box body and are communicated with a vanadium battery electrolyte system, the top surface of the sulfuric acid tank is communicated with an exhaust pipe, and the exhaust pipe extends out of the box body; therefore, the purpose of repairing the electrolyte of the all-vanadium battery on line without stopping the all-vanadium battery is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of all-vanadium battery operation and maintenance, and in particular to an online repair system for vanadium electrolyte. Background Art

[0002] All-vanadium battery, full name is all-vanadium redox battery (VRB), is a redox battery energy storage system based on the metal vanadium element. This battery uses vanadium ions of different valence states to undergo redox reactions in the electrolyte to store and release electrical energy.

[0003] After the all-vanadium battery has been running for a long time, as the battery is used for a longer time, the active substances in the electrolyte will be imbalanced in material and valence due to trace side reactions and long-term accumulation, resulting in a decrease in battery performance. Therefore, the electrolyte of the all-vanadium battery needs to be repaired in order to restore its performance, balance the electrolyte composition, remove impurities, increase concentration and purity, thereby extending the battery life and maintaining its high efficiency output.

[0004] At present, the electrolyte of the all-vanadium battery is repaired by extracting the electrolyte from the electrolyte storage tank when the system is shut down, and then repairing the electrolyte as a whole. After the repair is completed, the electrolyte is filled into the electrolyte storage tank, so that the all-vanadium battery can start running again.

[0005] In this way, the repair of the electrolyte requires the all-vanadium battery to be in a shutdown state, which affects its efficiency. Summary of the invention

[0006] The purpose of the present invention is to provide a vanadium electrolyte online repair system to achieve the purpose of online repair of the electrolyte of an all-vanadium battery without shutting down the all-vanadium battery.

[0007] In order to achieve the above object, the present invention adopts the following technical means: A vanadium electrolyte online repair system comprises a box body, wherein a sulfuric acid tank and a battery stack are arranged in the box body, a horizontal mounting platform is installed in the box body, the battery stack is placed on the mounting platform, the sulfuric acid tank is arranged below the mounting platform, the sulfuric acid tank is connected to the anode chamber of the battery stack through a first circulation system, the liquid inlet end and the liquid outlet end of the cathode chamber of the battery stack are respectively connected to a feed pipe and a discharge pipe, the feed pipe and the discharge pipe extend out of the box body and are connected to the vanadium battery electrolyte system, the top surface of the sulfuric acid tank is connected to an exhaust pipe, and the exhaust pipe extends out of the box body.

[0008] Preferably, the first circulation system includes a first acid liquid pipe connected to the bottom side of the sulfuric acid tank and a second acid liquid pipe connected to the top surface of the sulfuric acid tank, one end of the first acid liquid pipe is connected to the bottom side of the anode chamber of the fuel cell stack, and one end of the second acid liquid pipe is connected to the top side of the anode chamber of the fuel cell stack.

[0009] Furthermore, an acid pump is installed on the first acid pipe.

[0010] Furthermore, a vertical partition is provided in the box body, and the partition divides the inner cavity of the box body into an operation room and a working room. The sulfuric acid tank and the fuel cell stack are arranged in the working room, and an electronic control system for controlling the fuel cell stack is provided in the operation room.

[0011] Furthermore, the partition plate is provided with a through hole connecting the operation room with the working room, an exhaust fan is installed in the operation room, the exhaust fan is connected to the through hole, the bottom side of the box body is provided with a ventilation groove connected to the working room, and the box body is also provided with an exhaust groove connected to the operation room.

[0012] Furthermore, the through hole is arranged on the top of the partition plate.

[0013] During use, the present invention has the following beneficial effects: After the all-vanadium battery has been running for a period of time, when the electrolyte of the all-vanadium battery needs to be repaired, the electrolyte in the all-vanadium battery system is directly allowed to flow into the battery stack through the feed pipe, and then the sulfuric acid in the sulfuric acid tank is also allowed to enter the battery stack through the first circulation system, so that the electrolyte that needs to be repaired and the sulfuric acid react electrochemically in the battery stack, so that the electrolyte that has been repaired in the battery stack is discharged through the discharge pipe, and after the repair is completed, it returns to the all-vanadium battery system for continued use. At the same time, after the sulfuric acid passes through the battery stack and reacts electrochemically with the electrolyte, the generated gas returns to the sulfuric acid tank from the top of the sulfuric acid tank along with the acid, and when a large amount of gas exists in the sulfuric acid tank, the gas in the sulfuric acid tank is discharged through the exhaust pipe. This ensures the safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention.

[0015] Figure 2 for Figure 1 Schematic diagram of the front view structure.

[0016] Figure 3 It is a schematic diagram of the cross-sectional top view of the structure of the present invention.

[0017] Among them, 1-box, 2-sulfuric acid tank, 3-fuel cell, 4-mounting table, 5-feed pipe, 6-discharge pipe, 7-first acid liquid pipe, 8-second acid liquid pipe, 9-exhaust pipe, 10-acid liquid pump, 11-partition plate. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Please refer to Figures 1 to 3 As shown, a vanadium electrolyte online repair system includes a box body 1, a sulfuric acid tank 2 and a battery stack 3 are arranged in the box body 1, a horizontal mounting platform 4 is installed in the box body 1, the battery stack 3 is placed on the mounting platform 4, the sulfuric acid tank 2 is arranged below the mounting platform 4, the sulfuric acid tank 2 is connected to the anode chamber of the battery stack 3 through a first circulation system, the liquid inlet end and the liquid outlet end of the cathode chamber of the battery stack 3 are respectively connected to a feed pipe 5 and a discharge pipe 6, the feed pipe 5 and the discharge pipe 6 extend out of the box body 1 and are connected to the vanadium battery electrolyte system, the top surface of the sulfuric acid tank 2 is connected to an exhaust pipe 9, and the exhaust pipe 9 extends out of the box body 1.

[0025] In this way, after the all-vanadium battery has been running for a period of time, when the electrolyte of the all-vanadium battery needs to be repaired, the electrolyte in the all-vanadium battery system is directly allowed to flow into the battery stack 3 through the feed pipe 5, and then the sulfuric acid in the sulfuric acid tank 2 is also allowed to enter the battery stack 3 by using the first circulation system, so that the electrolyte that needs to be repaired and the sulfuric acid react electrochemically in the battery stack 3, so that the electrolyte that has been repaired in the battery stack 3 is discharged through the discharge pipe 6, and after the repair is completed, it is returned to the all-vanadium battery system for continued use. At the same time, after the sulfuric acid electrochemically reacts with the electrolyte through the battery stack 3, the generated gas returns to the sulfuric acid tank 2 from the top of the sulfuric acid tank 2 along with the acid, and when a large amount of gas exists in the sulfuric acid tank 2, the gas in the sulfuric acid tank 2 is discharged through the exhaust pipe 9. Thereby ensuring the safety of the equipment.

[0026] Furthermore, the first circulation system includes a first acid liquid pipe 7 connected to the bottom side of the sulfuric acid tank 2 and a second acid liquid pipe 8 connected to the top surface of the sulfuric acid tank 2, one end of the first acid liquid pipe 7 is connected to the bottom side of the anode chamber of the battery stack 3, and one end of the second acid liquid pipe 8 is connected to the top side of the anode chamber of the battery stack 3.

[0027] In this way, the acid liquid carrying the reaction gas can enter from the top of the sulfuric acid tank 2 through the second acid liquid pipe 8, and the acid liquid falls and is recovered under the action of gravity, while the gas exists above the liquid surface of the sulfuric acid tank 2, avoiding the gas from entering from the bottom of the sulfuric acid tank 2, allowing the gas to be in contact with the liquid phase in the sulfuric acid tank 2 for a long time.

[0028] Furthermore, an acid pump is installed on the first acid pipe 7.

[0029] Furthermore, in order to better dissipate the heat of the box body 1, a vertical partition plate 11 is also provided in the box body 1. The partition plate 11 divides the inner cavity of the box body 1 into an operation room and a working room. The sulfuric acid tank 2 and the fuel cell stack 3 are arranged in the working room, and an electronic control system for controlling the fuel cell stack 3 is provided in the operating room.

[0030] At the same time, the partition plate 11 is provided with a through hole connecting the operation room with the working room, an exhaust fan is installed in the operation room, and the exhaust fan is connected to the through hole, the bottom side of the box body 1 is provided with a ventilation groove connected to the working room, and the box body 1 is also provided with an exhaust groove connected to the operation room.

[0031] Furthermore, the through hole is disposed on the top of the partition plate 11 .

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vanadium electrolyte online repair system, characterized in that: The invention comprises a box (1), wherein a sulfuric acid tank (2) and a battery stack (3) are arranged in the box (1), a horizontal mounting platform (4) is installed in the box (1), the battery stack (3) is placed on the mounting platform (4), the sulfuric acid tank (2) is arranged below the mounting platform (4), the sulfuric acid tank (2) is connected to the anode chamber of the battery stack (3) through a first circulation system, the liquid inlet end and the liquid outlet end of the cathode chamber of the battery stack (3) are respectively connected to a feed pipe (5) and a discharge pipe (6), the feed pipe (5) and the discharge pipe (6) extend out of the box (1) and are connected to the vanadium battery electrolyte system, the top surface of the sulfuric acid tank (2) is connected to an exhaust pipe (9), and the exhaust pipe (9) extends out of the box (1).

2. The vanadium electrolyte online repair system according to claim 1, characterized in that: The first circulation system comprises a first acid liquid pipe (7) connected to the bottom side of the sulfuric acid tank (2) and a second acid liquid pipe (8) connected to the top surface of the sulfuric acid tank (2), one end of the first acid liquid pipe (7) being connected to the bottom side of the anode chamber of the battery stack (3), and one end of the second acid liquid pipe (8) being connected to the top side of the anode chamber of the battery stack (3).

3. A vanadium electrolyte online repair system according to claim 2, characterized in that: An acid pump (10) is installed on the first acid pipe (7).

4. The vanadium electrolyte online repair system according to claim 1, characterized in that: A vertical partition plate (11) is also provided in the box body (1), and the partition plate (11) divides the inner cavity of the box body (1) into an operation room and an operating room. The sulfuric acid tank (2) and the fuel cell stack (3) are arranged in the operating room, and an electric control system for controlling the fuel cell stack (3) is arranged in the operating room.

5. The vanadium electrolyte online repair system according to claim 4, characterized in that: The partition plate (11) is provided with a through hole connecting the operating room with the workroom, an exhaust fan is installed in the operating room, and the exhaust fan is connected to the through hole. The bottom side of the box body (1) is provided with a ventilation slot connected to the workroom, and the box body (1) is also provided with an exhaust slot connected to the operating room.

6. The vanadium electrolyte online repair system according to claim 5, characterized in that: The through hole is arranged on the top of the partition plate (11).

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